Alejandro Lara
62 lines
1.6 KiB
Dart
62 lines
1.6 KiB
Dart
import 'dart:async';
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import 'dart:io';
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import 'package:flutter/foundation.dart';
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import 'package:qrscanner/services/scan_launch_service.dart';
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typedef HardwareScanCallback = void Function(String rawValue);
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/// Integración con el escáner físico Honeywell vía Intent API nativa (EDA51).
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class HardwareScannerService {
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HardwareScannerService._();
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static final HardwareScannerService instance = HardwareScannerService._();
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final _scanLaunch = ScanLaunchService.instance;
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HardwareScanCallback? _onScan;
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void Function(Exception error)? _onError;
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StreamSubscription<String>? _scanSubscription;
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bool _active = false;
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bool get isActive => _active;
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static Future<bool> isAvailable() => instance._scanLaunch.isSupported();
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Future<bool> activate({
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required HardwareScanCallback onScan,
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void Function(Exception error)? onError,
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}) async {
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if (kIsWeb || !Platform.isAndroid) return false;
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_onScan = onScan;
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_onError = onError;
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await _scanLaunch.claimScanner();
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await _scanSubscription?.cancel();
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_scanSubscription = _scanLaunch.scanStream.listen(
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(code) => _onScan?.call(code),
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onError: (Object error) => _onError?.call(Exception(error.toString())),
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);
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_active = true;
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return _scanLaunch.isSupported();
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}
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Future<void> pause() async {
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_active = false;
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}
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Future<void> deactivate() async {
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await _scanSubscription?.cancel();
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_scanSubscription = null;
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_onScan = null;
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_onError = null;
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_active = false;
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}
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Future<void> ensureStopped() async {
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await deactivate();
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await _scanLaunch.releaseScanner();
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}
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} |